package com.hr.hrto.filter;

import com.alibaba.fastjson.JSON;
import com.hr.hrto.common.BaseContext;
import com.hr.hrto.common.R;
import com.hr.hrto.dto.DishDto;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: 黄瑞
 * @Date: 2022/07/05/14:00
 * @Description:检查用户是否已经完成登录
 * @version:1.0
 */
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {

    public static final AntPathMatcher PATH_MATCHER= new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        /**
         * 1、获取本次请求的URI
         * 2、判断本次请求是否需要处理
         * 3、如果不需要处理，则直接放行
         * 4、判断登录状态，如果已登录，则直接放行
         * 5、如果未登录则返回未登录结果
         */
        //1、获取本次请求的URI
        String requestURI = request.getRequestURI();
        log.info("拦截到请求: {}",requestURI);
        //2、判断本次请求是否需要处理
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg",
                "/user/login"


        };
        boolean check = check(urls, requestURI);
        //3、如果不需要处理，则直接放行
        if (check){
            log.info("本次请求不需要处理: {}",requestURI);
            filterChain.doFilter(request,response);
            return;
        }
        //4-1、判断登录状态，如果已登录，则直接放行
       if (request.getSession().getAttribute("employee")!=null){
           Long empid = (Long) request.getSession().getAttribute("employee");
           BaseContext.setCurrentId(empid);
           log.info("用户已登录: {}",request.getSession().getAttribute("employee"));
           long id = Thread.currentThread().getId();
           log.info("线程id:{}",id);
           filterChain.doFilter(request,response);
           return;
       }
        //4-2、判断登录状态，如果已登录，则直接放行
        if (request.getSession().getAttribute("user")!=null){
            Long userid = (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userid);
            log.info("用户已登录: {}",request.getSession().getAttribute("user"));

            filterChain.doFilter(request,response);
            return;
        }
        //5、如果未登录则返回未登录结果
        log.info("用户未登录");
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
    }
    public boolean check(String[] urls,String requestURI){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if (match)
                return true;
        }
        return false;
    }


}
